Relationship between Vegetation on Alternating Bar and Alluivial Process

Field Observation in the Yoshino River

Abstract

The purpose of this study is to clarlify the mutual relationship between river vegetation and river conditions. On the basis of a full vegetation survey performed on an alternating bar formed in the Yoshino River, Tokushima, Japan, some findings are presented with regard to the interaction between plant communities and alluvial process of the bar. A regression analysis is carried out to formulate local covering rates of some kinds of plant communities and bare lands with some parameters representing flood properties and morphological process of the bar. Resultant equations show significant correlation with the observations.